I have a rear rack for my Friday but it messes with the fold so it's most left off. The "under rack" bag is cute but gets FILTHY.

On the Friday, a Travois trailer is the best.

On my Soma minivelo, I run a front rack + rando bag and a Carradace "bag man" rear with a largish saddle bag. And then STILL carry the laptop in a messenger bag.